Submarine vessel.



C. LAURENTI.

SUBNARINE VESSEL.

y APPLacATm'N man Aus.r24.1915.

Patented Non 23, 19m

CESARE LAURENTI, OF TURIN, lllIAIl'JSZ', ASSIGNOR TO SOCIET FIAT-SAN @KORG-1G, 'Gli' SPEZIA, ITALY.

SUBMARINE VESSEL.

Specification of Letters Patent.

Patented Nov. 223i, tutti..

Application filed August 24, 1915. Serial Nof 47,025.

Z 10 all vw Lom t may concern.'

Be it known that l, CESARE LAURnNTI, engineer of Turin, Italy, have invented certain new and useful improvements in Submarine Vessels, of which thev following is a full, clear, and exact speciiication.

`he present invention relates to improvementsnn submarine vesselsand more particularly to means ,for accelerating the submergence of'such vessels by means of compressed air or of water Iunder pressure.

A known. phenomenon in the dynamics of gases and liquids is that of the injector o r what is termed lateral transmission of motion by virtue of which a j et of fluid under pressure introduced into a tube, 01 meeting in a tube another traversed fluid, accelerates the motion offthis latter in consequence of the partial vacuumwhich is set up at the zone where the two fluids meet. This phenomenon -may be applied to accelerate the submergence of submarines, by making use of a jet of air or water or other fluids singly or mixed under heavy pressure, this being injected into the main air pipe so as to encounter the current of air issuing from the escape pipes leading from the ballast tanks. In place of allowing,` the air to escape. from the upper part of the ballast tanks under the sole influence of the admis sion of water into the lower part, it is possible, by means of a jet of compressed air, or of water under pressure, in the air escape pipe to accelerate or assist the outliow of the air, and consequently increase the speed at which the Water enters the ballast tanks, thus diminishing the time required for immersion.

The application of the aforesaid principle of the injection of air or water under pressure into the main air escape pipe connected to the ballast tanks, may be carried out in different Ways one embodiment being illustrated in the accompanying drawing by way of example.

In this drawing A represents the main pipe to which are connected the pipes leading from, and through which issues the air escaping from the various ballast tanks; a represents the ballast tanks to be flooded; the bridge of the superstructure. A jet of compressed air from the slnall ycylinder (l is introduced into the pipe A, after the pressure ofthe air has been suitably reduced in passing through the reducing valve e. The jet of air injected into the said escape pipe produces an appreciable depression or partial vacuum in the exhaust pipes and consequently inthe ballast tanks, thus accelerating` the admission of water thereinto through the floodingl valves f. By suitably opening,` or closing the valve of the compressed air injector it will be seen vthat the rate ofv immersion of the boat can be regulated at will.

lVhat l claim is:`

In asubmarine, ballast tanks, pipes leading from the ballast tanks for the escape. of air therefrom when it is desired to admit water for submergence purposes, and an injector located in the air escape pipe for accelerating the liow of air from said ballast tanks and thereby accelerating the inflow of water and the submergence of such vessel.

Inl witness whereof, l have hereunto signed my naine 1n the presence of two subscribing witnesses.

CESARE LAURENT. Witnesses:

C. S. SEYLES, FnLrsn Banniere.. 

